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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101645 - Write access only in start-up state Device (device: p9 unequal 0).
Alarm 101645 indicates an attempt to write or modify system data or device parameters that can only be changed when the control is in start-up (boot) mode. This typically occurs when operators or programs try to alter protected configuration parameters during normal production operation instead of during system initialization.
101645
Siemens 840D 101645 - Write access only in start-up state Device (device: p9 unequal 0).
Write access only in start-up state Device (device: p9 unequal 0).
Siemens SINUMERIK operator message 101645: Write access only in start-up state Device (device: p9 unequal 0). This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 101645 indicates an attempt to write or modify system data or device parameters that can only be changed when the control is in start-up (boot) mode. This typically occurs when operators or programs try to alter protected configuration parameters during normal production operation instead of during system initialization.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Review the recent actions taken before the alarm occurred. Identify if any machine data (MD), setting data (SD), or drive parameters were being modified.
- 2
Access the start-up mode by selecting 'Start-up' or 'Commissioning' mode from the operating area menu (typically requires access level 4 - manufacturer or service level).
Ensure no production processes are running. Entering start-up mode will interrupt normal operation.
- 3
Make the required parameter changes in start-up mode, then activate the changes using the appropriate activation method (NCK reset, power-on reset, or parameter activation depending on the specific parameter).
Document all parameter changes for traceability and backup purposes.
- 4
Exit start-up mode and return to normal operating mode. Verify the machine functions correctly with the new parameters.
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Always verify with your machine manual or a certified technician before performing service procedures.